Why might acting happy actually make one happy

A car is traveling at a constant speed of 12 m/s when the driver accelerates the car reaches a speed of 26 m/s in 6 s what is the average acceleration of the car?

Which of the following is a property of all periodic waves? A. They follow a repeating pattern as they propagate. B. They oscillate in a direction perpendicular to the direction in which they propagate. C. They tend to propagate in a circle. D.

A 180kg mass at the earth's surface weighs

A measure of the force necessary to stretch or break the surface of a liquid

And 8 kg bowling ball is rolling along the frictionless alley

How long did the astronauts stay on the moon?

Brenda is standing on the beach; the sea is choppy. she observes that the crests of distant waves appear not only smaller, but also closer together than do the crests of waves nearer the beach. this example illustrates a depth cue known as:

If two waves in the same space interfere completely destructively, which of the following occurs? A. The amplitude decreases. B. The amplitude increases. C. The wave speed increases. D. The wave speed decreases.

An electric force exists between which pair of objects? Check all that apply. A) a neutral object and a negative object two negative objects B) a neutral object and a positive object C) two positive objects D) a negative object and a positive object

A person jogs 40 km in 32 minutes then 20 km in 22 minutes and finally 10 km in 16 minutes what is his average speed in in per minute